US3118778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aggregates of slags
Assignee: Knapsack AG
•
Filing: 1960-04-15
•
Granted: 1964-01-21
•
Expires: 1980-04-15
Abstract
No abstract record available.
Inventors
- 👤 Rodis Franz
- 👤 Cremer Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/14; C04B18/141; C04B18/145; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
LIGHT WEIGHT CONCRETE MIXES CONTAINING A FOAMED SLAG AGGREGATE HAVING UNIFORMLY DISTRIBUTED PORES IN WHICH MORE THAN 85% AND UP TO 100% OF THE PORES ARE CLOSED, SAID AGREAGATE BEING OBTAINED FROM SLAG FORMED AS A BY-PRODUCT IN ELECTROTHERMAL PHOSPHATE REDUCTION FURNACES AND CONTAINING CALCIUM OXIDE AND SILICON DIOXIDE IN A RATIO OF ABOUT 47:43.
Claim 2
Dependent Claim
55 words
LIGHT WEIGHT CONCRETE MIXES CONTAINING A FOAMED SLAG AGGREGATE HAVING UNIFORMLY DISTRIBUTED PORES IN WHICH MORE THAN 85% AND UP TO 100% OF THE PORES ARE CLOSED, SAID AGREAGATE BEING OBTAINED FROM SLAG FORMED AS A BY-PRODUCT IN ELECTROTHERMAL PHOSPHATE REDUCTION FURNACES AND CONTAINING CALCIUM OXIDE AND SILICON DIOXIDE IN A RATIO OF ABOUT 47:43.
References Cited (Backward Citations)
US2021956A
Cited
US2212962A
Cited
US2443103A
Cited
US2460742A
Cited
US2590902A
Cited
US2590901A
Cited
US2778160A
Cited
US2977239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |